| /******************************************************************************* |
| * Copyright (c) 2000, 2012 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class provide an etched border |
| * with an optional title. |
| * <p> |
| * Shadow styles are hints and may not be honoured |
| * by the platform. To create a group with the |
| * default shadow style for the platform, do not |
| * specify a shadow style. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the above styles may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class Group extends Composite { |
| long /*int*/ clientHandle, labelHandle; |
| String text = ""; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#SHADOW_ETCHED_IN |
| * @see SWT#SHADOW_ETCHED_OUT |
| * @see SWT#SHADOW_IN |
| * @see SWT#SHADOW_OUT |
| * @see SWT#SHADOW_NONE |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Group (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| style |= SWT.NO_FOCUS; |
| /* |
| * Even though it is legal to create this widget |
| * with scroll bars, they serve no useful purpose |
| * because they do not automatically scroll the |
| * widget's client area. The fix is to clear |
| * the SWT style. |
| */ |
| return style & ~(SWT.H_SCROLL | SWT.V_SCROLL); |
| } |
| |
| @Override |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| @Override |
| long /*int*/ clientHandle () { |
| return clientHandle; |
| } |
| |
| @Override |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| Point size = super.computeSize(wHint, hHint, changed); |
| int width = computeNativeSize (handle, SWT.DEFAULT, SWT.DEFAULT, false).x; |
| size.x = Math.max (size.x, width); |
| return size; |
| } |
| @Override |
| public Rectangle computeTrim (int x, int y, int width, int height) { |
| checkWidget(); |
| forceResize (); |
| GtkAllocation allocation = new GtkAllocation(); |
| gtk_widget_get_allocation (clientHandle, allocation); |
| int clientX = allocation.x; |
| int clientY = allocation.y; |
| x -= clientX; |
| y -= clientY; |
| width += clientX + clientX; |
| height += clientX + clientY; |
| return new Rectangle (x, y, width, height); |
| } |
| |
| @Override |
| void createHandle(int index) { |
| state |= HANDLE | THEME_BACKGROUND; |
| fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| gtk_widget_set_has_window (fixedHandle, true); |
| handle = OS.gtk_frame_new (null); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| labelHandle = OS.gtk_label_new (null); |
| if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.g_object_ref (labelHandle); |
| OS.g_object_ref_sink (labelHandle); |
| clientHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (clientHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| if (OS.GTK3) { |
| OS.gtk_widget_override_background_color (clientHandle, OS.GTK_STATE_FLAG_NORMAL, new GdkRGBA ()); |
| long /*int*/ region = OS.gdk_region_new (); |
| OS.gtk_widget_input_shape_combine_region (clientHandle, region); |
| OS.gdk_region_destroy (region); |
| } |
| OS.gtk_container_add (fixedHandle, handle); |
| OS.gtk_container_add (handle, clientHandle); |
| if ((style & SWT.SHADOW_IN) != 0) { |
| OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_IN); |
| } |
| if ((style & SWT.SHADOW_OUT) != 0) { |
| OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_OUT); |
| } |
| if ((style & SWT.SHADOW_ETCHED_IN) != 0) { |
| OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_IN); |
| } |
| if ((style & SWT.SHADOW_ETCHED_OUT) != 0) { |
| OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_OUT); |
| } |
| // In GTK 3 font description is inherited from parent widget which is not how SWT has always worked, |
| // reset to default font to get the usual behavior |
| if (OS.GTK3) { |
| setFontDescription(defaultFont().handle); |
| } |
| } |
| |
| @Override |
| void deregister () { |
| super.deregister (); |
| display.removeWidget (clientHandle); |
| display.removeWidget (labelHandle); |
| } |
| |
| @Override |
| void enableWidget (boolean enabled) { |
| OS.gtk_widget_set_sensitive (labelHandle, enabled); |
| } |
| |
| @Override |
| long /*int*/ eventHandle () { |
| return fixedHandle; |
| } |
| |
| @Override |
| String getNameText () { |
| return getText (); |
| } |
| |
| /** |
| * Returns the receiver's text, which is the string that the |
| * is used as the <em>title</em>. If the text has not previously |
| * been set, returns an empty string. |
| * |
| * @return the text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getText () { |
| checkWidget(); |
| return text; |
| } |
| |
| @Override |
| void hookEvents () { |
| super.hookEvents(); |
| if (labelHandle != 0) { |
| OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.getClosure (MNEMONIC_ACTIVATE), false); |
| } |
| } |
| |
| @Override |
| boolean mnemonicHit (char key) { |
| if (labelHandle == 0) return false; |
| boolean result = super.mnemonicHit (labelHandle, key); |
| if (result) setFocus (); |
| return result; |
| } |
| |
| @Override |
| boolean mnemonicMatch (char key) { |
| if (labelHandle == 0) return false; |
| return mnemonicMatch (labelHandle, key); |
| } |
| |
| @Override |
| long /*int*/ parentingHandle() { |
| return fixedHandle; |
| } |
| |
| @Override |
| void register () { |
| super.register (); |
| display.addWidget (clientHandle, this); |
| display.addWidget (labelHandle, this); |
| } |
| |
| @Override |
| void releaseHandle () { |
| super.releaseHandle (); |
| clientHandle = labelHandle = 0; |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| if (labelHandle != 0) OS.g_object_unref (labelHandle); |
| text = null; |
| } |
| |
| @Override |
| void setBackgroundColor (GdkColor color) { |
| super.setBackgroundColor (color); |
| setBackgroundColor(fixedHandle, color); |
| } |
| |
| @Override |
| void setFontDescription (long /*int*/ font) { |
| super.setFontDescription (font); |
| setFontDescription (labelHandle, font); |
| } |
| |
| @Override |
| void setForegroundColor (GdkColor color) { |
| super.setForegroundColor (color); |
| setForegroundColor (labelHandle, color); |
| } |
| |
| @Override |
| void setOrientation (boolean create) { |
| super.setOrientation (create); |
| if ((style & SWT.RIGHT_TO_LEFT) != 0 || !create) { |
| int dir = (style & SWT.RIGHT_TO_LEFT) != 0 ? OS.GTK_TEXT_DIR_RTL : OS.GTK_TEXT_DIR_LTR; |
| OS.gtk_widget_set_direction (labelHandle, dir); |
| } |
| } |
| |
| /** |
| * Sets the receiver's text, which is the string that will |
| * be displayed as the receiver's <em>title</em>, to the argument, |
| * which may not be null. The string may include the mnemonic character. |
| * </p> |
| * Mnemonics are indicated by an '&' that causes the next |
| * character to be the mnemonic. When the user presses a |
| * key sequence that matches the mnemonic, focus is assigned |
| * to the first child of the group. On most platforms, the |
| * mnemonic appears underlined but may be emphasised in a |
| * platform specific manner. The mnemonic indicator character |
| * '&' can be escaped by doubling it in the string, causing |
| * a single '&' to be displayed. |
| * </p> |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setText (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| text = string; |
| char [] chars = fixMnemonic (string); |
| byte [] buffer = Converter.wcsToMbcs (null, chars, true); |
| OS.gtk_label_set_text_with_mnemonic (labelHandle, buffer); |
| if (string.length () != 0) { |
| if (OS.gtk_frame_get_label_widget (handle) == 0) { |
| OS.gtk_frame_set_label_widget (handle, labelHandle); |
| } |
| } else { |
| OS.gtk_frame_set_label_widget (handle, 0); |
| } |
| } |
| |
| @Override |
| void showWidget () { |
| super.showWidget (); |
| if (clientHandle != 0) OS.gtk_widget_show (clientHandle); |
| if (labelHandle != 0) OS.gtk_widget_show (labelHandle); |
| } |
| } |